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D. HATTAN, OF 'ZANES'VILLE, O HIO.

Letters Patent life/80,731, dated August 4, 1868.

IMPROVEMENT IN FIREPL AGES.

Be it known that I,'.D. HATTAN, of Zanesville, in the county ofMuskingum, and State of Ohio, have invented a new and improvedFire-Back; and I do hereby declare that the following is a full, clear,and exact description thereof, which will enable those skilled in ,theart to make and use the same, reference being hadto the accompanyingdrawings, forming part of this specification.

This invention relates to an improvement in the backs of fireplaces.

And it consists in arranging a horizontal-sliding plate therein, andproviding for the admission of cold air, whereby a more perfectcombustion of the gases which are evolved from the fuel is obtained, andfuel thereby economized. v

The drawing represents a vertical section of a fireplace, constructedaccording to my invention.

A is the fire-.box or place for the fuel.

B represents the flue, through whichthe smolie and products ofcombustion pass to the chimney.

G is a sliding plate in the back, D, of the fireplace. i

E represents an air-tube, placed directly-below the plate G.

g.is an angular wing or flange on the plate, G, for convenienceiii-moving the plate back and forth.

h is thethroat of the flue, which may be increased or diminished in areaas the plate G is pushed hack'or drawn out,-thereby deflecting more orless of the heat, and throwing it into the room.

The current of air which passes through the tube E mingles with theheated gases which are ascending,

and by giving a new supply of oxygen to those heated gases, a newcombustion .is produced, and a'great portion of the ascendingcarbonic-oxide gas is consumed, and the. quantity of heat is greatlyincreased thereby.

By the ordinary method of combustion in fireplaces or fir'e-grates alarge percentage of the fuel passes up the chimney unconsumcd, for thewant of an additional supply of air properly applied.

This invention meets the difficulty efi'ectuall'y, As the heated gasesimpinge against the plate G, they meet with a new supply of air, andmingle therewith, and are, to a good degree, consumed,the heat isincreased, and fuel saved.

- I claim as new, and desire to secure by Letters Patent- In combinationwith a fireplace-back provided witha sliding plate, C, one or moreair-tubes, E, arranged I in 'and through the back, beneath the plate,substantially as setrfo'rth.

' D. HATTAN.

Witnesses:

WM. J. Woonsrnn, EDGAR W. ALLEN.

